Abstrakti
In this communication a mechanism for spider silk strain hardening is proposed. Shear failure of β-sheet nanocrystals is the first failure mode that gives rise to the creation of smaller nanocrystals, which are of higher strength and stiffness. β-sheet unfolding requires more energy than nanocrystal separation in a shear mode of failure. As a result, unfolding occurs after the nanocrystals separate in shear. β-sheet unfolding yields a secondary strain hardening effect once the β-sheet conformation is geometrically stable and acts like a unidirectional fibre in a fibre reinforced composite. The mechanism suggested herein is based on molecular dynamics calculations of residual inter-β-sheet separation strengths against residual intra-β-sheet unfolding strengths
Alkuperäiskieli | Ei tiedossa |
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Sivut | – |
Julkaisu | Advances in Natural Sciences: Nanoscience and Nanotechnology |
Vuosikerta | 5 |
Numero | 1 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 2014 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |